Fountain pen for recording instruments



NEW. 25, 1924."

J. BAST FOUNTAIN PEN'FCR RECORDING INSTRUMENTS Filed Aug.

INVENTOR lw 7 W fla ATTORNEYS Patented Nov. 25, 1924.

UNITED STATES 1,516,586 PATENT OFFICE.

rnanx J. BAST, or BROOKLYN, NEW YORK, MFG. 00., or BROOKLYN, NEW YORK,

ASSIGNOR TO CHARLES J. TAGLIABUE A CORPORATION OF NEW YORK.

p FOUNTAIN PEN FOR RECORDING INSTRUMENTS.

Application filed August 7, 1923.' Serial No. 656,151.

To all whom it may concern:

Be it known that I, FRANK J. BAST, a citizen of the United States, andresident of the borough of Brooklyn, county of Kings, have inventedFountain Pens for Recording Instruments, of which the following is aspecification.

My invention relates to fountain pens for recording instruments in whichthe pen is automatically controlled and comprises the instrumentalitywhereby a record is automatically produced upon a chart operativelycombined with the recording instrument which may comprise a recordingthermometer or the like. Up to the present time fountain pens of thischaracter have included ink channels which of necessity must 1 be ofvery minute cross-sectional dimensions in order to properly control theflow of ink and which accordingly become very easily clogged up orotherwise disarranged. The particular object of my invention is tosimplify the construction of such fountain pens and to do away with thenecessity for ink channels of. the type referred to and to substitutetherefor an arangement which is eflicient in operation and which mayreadily be maintained in an operative condition of maximum eificiencv.Other more specific objects will appear from the descriptionhereinafter.

In the accompanying drawings, Fig. 1 is a sectional view of the fountainpen on an enlar ed scale taken on the line 11 of Fig. 2, and Fig. 2 is aplan view thereof.

In practice the fountain pen is located at the free end of a pen arm inthe customary manner which is operated and controlled by the mechanismforming part of the instrument and whereby the predetermined conditionsto be recorded are reflected in the actuation of the pen arm and thefountain pen. The latter, as shown in the drawing, comprises areceptacle or well 5, having one end open and provided with a member 6exdirection adjacent to the open end of said well. The member 6 isprovided with a writing point 7 and in cross-section is of convergingform to provide an ink channel 8 which, as shown in Fig. 1 is completelyopen and, if desired, may be provided with inwardly extending flanges 9which project toward each other as shown in Fig. 2. The chantendingoutwardly therefrom in a radial nel 8 is in communication with theinterior of the receptacle or well 5 as illustrated in the drawings. Inorder to control the flow of the ink to the point 7 acapillary formingwire 10 is provided; the latter comprises a U-shaped section consistingof legs 11 and 12, the former terminating in an eyelet l3 and the latterbeing continued in the form of a transversely extending member 14. Thecapillary forming wire is so dimensioned and constructed that theU-shaped section thereof, in practice, extends into the Well 5 with theleg 11 in engagement with the inner surface thereof and the eyelet 13resting upon the upper edge of said well. The leg 12 of the capillaryforming wire is spaced to a slight degree from the inner surface of thewell 5 at a point diametrically opposite to the leg 11 and forms acapillary channel 15 while the member 14 at its free end 16 rests uponthe bottom of the channel 8 and rises from this point to a slight degreetoward the leg 12 to form a continuing capillary channel in the channel8 of the pen 6.

,With this arrangement the ink, by capillary action, flows along thecapillary channels 15 and 8 to the point 7 of the pen and passestherefrom to the chart in the form of a visible record.and in accordancewith the movements of the fountain pen as induced by the pen arm and therecording mechanism. The flow of ink is adequately and efiicientlycontrolled by the capillary forming wire 10 in the manner described andpasses from joint 7 in exactly the amount required to produce therecording line as the pen arm and pen are automatically actuated. If,for any reason, such as clogging or other disarrangement, it becomesnecessary to clean or repair the fountain pen, the capillary formingwire 10, may be removed therefrom by simply exerting a lifting actionupon the eyelet 13. When this has been done all parts of the fountainpen are readily accessible and easily cleaned.

.to the production of such minute ink channels, which is relativelylarge, is also obviated with the present construction.

The improved fountain pen 1s adapted for use in connection with any typeof recording mechanism re uiring such a pen and may easily and rea ilyreplace existing forms of fountain pens.

Various changes in the specific form shown and described may be madewithin the scope of the claims without departing from the spirit of myinvention.

I claim:

1. A fountain pen for recording instruments comprising an inkwell, a penprojecting therefrom and provided with an exposed ink channel, and awire extending into said inkwell and lengthwise of said ink channel andforming a capillary channel in the ink well and lengthwise of the penfor controlling the flow of ink along said ink channel.

2. A fountain pen for recording instru-- ments comprising an inkwell, apen rojecting outwardly therefrom in a ra ial direction and having anexposed ink channel, a capillary forming wire havin a U- shaped sectionextending into said we 1 with one leg in engagement with the innersurface thereof and the other leg s 'aced from said inner surface toform a caplllary channel and a transverse member extending lengthwise ofsaid ink channel at an inclination relatively thereto to form acontinuing capillary channel whereby the flow of ink to the pen point iscontrolled.

In testimony whereof I have hereunto set my hand.

FRANK J. BAST.

